1/2" CONDUIT LOCKNUT

Product Description (ARL-401)

• Type: Threaded conduit locknut
• Trade Size: 1/2 inch
• Material: Steel
• Finish: Zinc plated for corrosion resistance
• Function: Locks conduit fittings into knockout openings in boxes or panels
• Use With: Rigid conduit and IMC conduit systems
• Listing: UL/CSA compliant

Common Uses

• Securing 1/2" conduit entries into electrical boxes
• Holding conduit fittings tight in panels, junction boxes, and enclosures
• Maintaining a stable mechanical and grounding connection
• Residential, commercial, and industrial wiring installations

Key Idea

The ARL-401 is the smallest standard locknut in the 400-series, and its only job is to secure threaded conduit fittings in place so they don’t loosen from vibration or movement.

Context in Arlington lineup

• ARL-401 → 1/2" locknut
• ARL-402 → 3/4" locknut
• ARL-406 → 2" locknut
• Part of the 400-series rigid/IMC hardware family